Dust removal structure utilizing airflowwhirls, and dust collector

ABSTRACT

The present application discloses a dust removal structure ( 1 ) utilizing airflow whirls, and a dust collector. The dust removal structure ( 1 ) utilizing airflow whirls comprises an outer barrel ( 11 ), a first internal barrel ( 12 ), a second internal barrel ( 13 ), a third internal barrel ( 14 ) arranged at one end of the second internal barrel ( 13 ), and a whirl barrel ( 15 ) arranged at another end of the second internal barrel ( 13 ), a first airflow whirl chamber ( 101 ) is formed between the outer barrel ( 11 ) and the first internal barrel ( 12 ), a second airflow whirl chamber ( 201 ) is formed between the first internal barrel ( 12 ) and the second internal barrel ( 13 ), an interior of the whirl barrel ( 15 ) is provided with a whirl chamber ( 1501 ), and an interior of the second internal barrel ( 13 ) and an interior of the third internal barrel ( 14 ) together form a third airflow whirl chamber ( 301 ).

CROSS REFERENCE TO RELATED APPLICATIONS

The present application is a National Stage of PCT Application No. PCT/CN2020/134206 filed on Dec. 7, 2020, the content of which is incorporated herein by reference thereto.

TECHNICAL FIELD

The present application relates to the field of dust removal technologies, and particularly to a dust removal structure utilizing airflow whirls, and a dust collector.

BACKGROUND

With the continuous improvement of the economic level, residents have higher and higher requirements for cleanliness of a living environment. In order to reduce the burden of manual cleaning, various automatic dust collection apparatuses have emerged. The dust collection apparatus generally uses a motor which rotates at a high speed to generate negative air pressure in a sealed housing to suck dust and debris.

However, due to continuous accumulation of the dust and debris, some of the dust and debris will be affected by airflow and have a tendency to move to the filter, and adhere to the filter, causing the filter screen of the filter to be clogged so that the dust suction capacity is rapidly reduced, and causing the filter difficult to be cleaned so that its service life is rapidly shortened.

TECHNICAL PROBLEM

One of purposes of embodiments of the present application is to provide a dust removal structure utilizing airflow whirls and a dust collector, which are aimed to solve the problem that the filter is easy to be clogged and the service life is relatively short.

SUMMARY

In order to solve the above technical problem, the technical solutions adopted in embodiments of the present application are as follows.

A first aspect provides a dust removal structure utilizing airflow whirls, which comprises an outer barrel, a first internal barrel arranged inside the outer barrel, a second internal barrel arranged inside the first internal barrel, a third internal barrel arranged at one end of the second internal barrel, and a whirl barrel arranged at another end of the second internal barrel. Among them, the whirl barrel is configured to communicate with a filter, a first airflow whirl chamber is formed between the outer barrel and the first internal barrel, a second airflow whirl chamber is formed between the first internal barrel and the second internal barrel, an interior of the whirl barrel is provided with a whirl chamber, and an interior of the second internal barrel and an interior of the third internal barrel together form a third airflow whirl chamber, the outer barrel is provided with a first air inlet communicating with the first airflow whirl chamber, the first internal barrel is provided with a second air inlet communicating with the first airflow whirl chamber and the second airflow whirl chamber, the whirl chamber and the second airflow whirl chamber communicate with each other through a second air outlet, and the whirl chamber and the third airflow whirl chamber communicate with each other through a third air inlet.

In one embodiment, the outer barrel comprises an outer cylinder portion and a base portion connected to one end of the outer cylinder portion, a periphery of the third internal barrel is sleeved with a dust collection barrel, and one end of the dust collection barrel away from the second internal barrel is connected to the base portion, and the dust collection barrel, the base portion and the outer cylinder portion are enclosed to form a first dust collection chamber, and the dust collection barrel, the third internal barrel and the base portion form a third dust collection chamber.

In one embodiment, one end of the third internal barrel away from the second internal barrel is provided with a dust baffle plate, and a dust outlet communicating with the third dust collection chamber is provided at the third internal barrel near the dust baffle plate.

In one embodiment, the first internal barrel comprises a plurality of grilles arranged in an annular array, and an air inlet gap is provided between adjacent two of the grilles, and a plurality of the air inlet gaps constitutes the second air inlet.

In one embodiment, the whirl barrel comprises a whirl cylinder portion, an air guiding portion arranged at the whirl cylinder portion, and a whirl bottom, the whirl bottom is connected to one end of the whirl cylinder portion near the first internal barrel, and the second air outlet is provided on the whirl bottom.

In one embodiment, one end of the second internal barrel near the third internal barrel is radially extended to form an annular protruded portion, and the first internal barrel, the second internal barrel, the annular protruded portion and the whirl bottom are enclosed to form the second airflow whirl chamber.

In one embodiment, the annular protruded portion is provided with a positioning hole, and the first internal barrel is provided with a positioning column configured to insert into the positioning hole.

In one embodiment, the air guiding portion comprises a plurality of diverging blades circumferentially arranged and configured to make airflow flow from an edge of the whirl cylinder portion toward a center of the whirl cylinder portion.

In one embodiment, the whirl barrel further comprises a central support portion, and both ends of the diverging blades are connected to an inner wall of the whirl cylinder portion and the central support portion respectively.

In one embodiment, the central support portion comprises an annular portion and an internal guiding cylinder formed by extending an inner ring of the annular portion toward an axial direction of the third airflow whirl chamber, and the diverging blades are connected to the annular portion and arranged at a periphery of the internal guiding cylinder.

In one embodiment, the first internal barrel and the whirl barrel are integrally formed.

In one embodiment, the second internal barrel and the third internal barrel jointly form a conical barrel, and a bottom end of the conical barrel is arranged near the whirl chamber.

A second aspect provides a dust collector, which comprises the dust removal structure utilizing airflow whirls described above, and further comprises a motor configured to generate airflow, a filter provided at one end of the whirl barrel away from the third internal barrel, and a suction head assembly configured to clean ground.

In one embodiment, the suction head assembly is provided with a side brush configured to clean dead corners.

BENEFICIAL EFFECTS

Beneficial effects of the dust removal structure utilizing airflow whirls provided by the embodiments of the present application lie in that: the dust removal structure utilizing airflow whirls includes the outer barrel, the first internal barrel, the second internal barrel, the whirl barrel, and the third internal barrel, when the motor is working, the first airflow whirl chamber is formed between the outer barrel and the first internal barrel, the second airflow whirl chamber is formed between the first internal barrel and the second internal barrel, and the third airflow whirl chamber is formed inside the second internal barrel and the third internal barrel, so that part of the dust and debris settles at the bottom of the first airflow whirl chamber, the air after the first settlement passes through the first internal barrel and then enters into the second airflow whirl chamber such that part of the dust and debris settles at the bottom of the second airflow whirl chamber, and the air after the second settlement passes through the second air outlet and then enters into the whirl chamber such that the air, after guided by the whirl chamber, enters into the third airflow whirl chamber of the third internal barrel for the third settlement. This dust removal structure utilizing airflow whirls can be used to settle the dust and debris three times, which greatly reduces the amount of dust and debris entering the filter. Moreover, the filter is arranged at the whirl barrel which is far away from the third dust collection chamber, so that the dust and debris are not easy to enter into the filter under the effect of the airflow, thereby the service life of the filter can be prolonged.

Beneficial effects of the dust collector provided by the embodiments of the present application lie in that: the dust collector adopts the dust removal structure utilizing airflow whirls described above, the dust removal structure utilizing airflow whirls is provided with the first airflow whirl chamber, the second airflow whirl chamber and the third airflow whirl chamber, which can perform three times of settlements for the inhaled dirty air, thereby greatly reducing the amount of the dust and debris entering into the filter, moreover, the filter is arranged at the whirl barrel which is far from the third dust collection chamber, and hence the dust and debris are not easy to enter into the filter under the effect of the airflow, thereby the service life of the filter can be prolonged and the replacement frequency of the filter in the dust collector can be reduced. Further, the suction head assembly of the dust collector is provided with the side brush, and the side brush can clean the sanitary dead corners such as corners of the walls and the like, thereby improving the cleaning power of the dust collector.

DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that need to be used in the description for the embodiments or exemplary technologies will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings may also be obtained for those of ordinary skill in the art based on these drawings without paying creative effort.

FIG. 1 is a first stereoscopic structural diagram of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application (in which a part cutaway of a housing is shown).

FIG. 2 is a second stereoscopic structural diagram of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application (the housing is removed).

FIG. 3 is a cross-sectional view of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application.

FIG. 4 is a stereoscopic structural diagram of a second airflow whirl chamber provided by an embodiment of the present application.

FIG. 5 is a third stereoscopic structural diagram of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application.

FIG. 6 is a structural diagram of a transverse section of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application.

FIG. 7 is a structural diagram of a transverse section and a longitudinal section of the dust removal structure utilizing airflow whirls provided by an embodiment of the present application.

FIG. 8 is a stereoscopic structural diagram of a first internal barrel and a whirl barrel provided by an embodiment of the present application.

FIG. 9 is a stereoscopic structural diagram of a second internal barrel, a third internal barrel and a dust collection barrel provided by an embodiment of the present application.

FIG. 10 is a cross-sectional view of the second internal barrel, the third internal barrel and the dust collection barrel provided by an embodiment of the present application.

FIG. 11 is a stereoscopic structural diagram of the dust collector provided by an embodiment of the present application.

FIG. 12 is a front view of a suction head assembly provided by an embodiment of the present application.

Among them, the reference signs in the figure are as follows:

101—first airflow whirl chamber; 102—first dust collection chamber; 103—first air inlet; 201—second airflow whirl chamber; 202—second air inlet; 203—second air outlet; 301—third airflow whirl chamber; 302—third dust collection chamber; 303—three air inlet; 304—dust outlet;

1—dust removal structure utilizing airflow whirls; 11—outer barrel; 111—outer cylinder portion; 112—base portion; 12—first internal barrel; 121—grille; 1211—positioning column; 13—second internal barrel; 131—annular protruded portion; 1311—positioning hole; 14—third internal barrel; 141—dust baffle plate; 143—connecting rib; 15—whirl barrel; 1501—whirl chamber; 151—whirl cylinder portion; 152—whirl bottom portion; 153—air guiding portion; 1531—diverging blade; 154—central support part; 1541—annular portion; 1542—internal guiding cylinder; 1543—reinforcing rib; 16—dust collection barrel; 2—filter; 3—suction head assembly; 31—suction head casing; 32—side brush; 321—hub; 322—bristles.

EMBODIMENTS OF THE APPLICATION

In order to make the purposes, technical solutions, and advantages of the present application more comprehensible, the present application is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to illustrate the present application, and are not used to limit the present application.

It should be noted that, when a component is referred to as being “fixed to” or “arranged to” another component, it may be directly or indirectly on said another component; when a component is referred to as being “connected to ” another component, it may be directly or indirectly connected to said another component. The orientations or positional relationships indicated by the terms such as “upper”, “lower”, “left”, “right”, etc. are based on the orientations or positional relationships as shown in the drawings, which are only for ease of description, and do not indicate or imply that the indicated apparatus or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present application. For those of ordinary skill in the art, the specific meaning of the above terms can be understood according to specific conditions. The terms “first” and “second” are only used for ease of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of a technical feature. The meaning of “plurality” means two or more, unless otherwise explicitly and specifically defined.

In order to illustrate the technical solutions provided by the present application, detailed descriptions are given below in conjunction with specific drawings and embodiments.

In one of the embodiments of the present application, please refer to FIGS. 1 to 3, the dust removal structure 1 utilizing airflow whirls includes an outer barrel 11, a first internal barrel 12, a second internal barrel 13, a third internal barrel 14 and a whirl barrel 15. The first internal barrel 12 is arranged inside the outer barrel 11, the second internal barrel 13 is arranged inside the first internal barrel 12, and the third internal barrel 14 and the whirl barrel 15 are respectively arranged at both ends of the second internal barrel 13. One end of the whirl barrel 15 away from the second internal barrel 13 is configured to connect with a filter 2. A first airflow whirl chamber 101 is formed between the outer barrel 11 and the first internal barrel 12, a second airflow whirl chamber 201 is formed between the first internal barrel 12 and the second internal barrel 13, an interior of the whirl barrel 15 is provided with a whirl chamber 1501, and an interior of the second internal barrel 13 and an interior of the third internal barrel 14 together form a third airflow whirl chamber 301. The outer barrel 11 is provided with a first air inlet 103 to allow sucked air to enter into the dust removal structure 1 utilizing airflow whirls. The first internal barrel 12 is provided with a second air inlet 202, and the second air inlet 202 communicates with the first airflow whirl chamber 101 and the second airflow whirl chamber 201. The second airflow whirl chamber 201 and the whirl chamber 1501 communicate with each other through a second air outlet 203, and the whirl chamber 1501 and the third airflow whirl chamber 301 communicate with each other through a third air inlet 303. The spline curves in FIG. 1 represent the airflow, and the spiral lines in FIG. 2 represent the airflow. When a motor is working, the sucked dirty air enters into the first airflow whirl chamber 101 through the first air inlet 103 of the outer barrel 11. Since the outer barrel 11 and the first internal barrel 12 are both cylindrical, the first airflow whirl chamber 101 is in a shape of a circular ring, and a whirling airflow is formed in the first airflow whirl chamber 101, such that settlement is carried out first time in the first airflow whirl chamber 101, and the airflow after the first settlement passes through the second air inlet 202 of the first internal barrel 12 and then enters into the second airflow whirl chamber 201. Since the first internal barrel 12 and the second internal barrel 13 are both cylindrical, the whirling airflow is formed in the second airflow whirl chamber 201, such that the settlement is carried out second time in the second airflow whirl chamber 201, and the airflow after the second settlement passes through the second air outlet 203 and then enters into the whirl chamber 1501. After guided by the whirl chamber 1501, the airflow passes through the third air inlet 303 and then enters into the third airflow whirl chamber 301, such that the settlement is carried out third time in the third airflow whirl chamber 301, and the whirling airflow after the third settlement enters into the filter 2 through the whirl chamber 1501. When the dust removal structure 1 utilizing airflow whirls performs dust removal, three times of dust and debris settlements are performed on the dirty airflow, so that the dust and debris in the air are removed as much as possible, thereby relieving the clogging of the filter 2. In addition, the arrangement of the whirl barrel 15 can not only form the whirling airflow and enable the airflow to enter into the third airflow whirl chamber 301 in a whirling shape, but also make it difficult for the dust and debris in the second airflow whirl chamber 201 to enter into the third airflow whirl chamber 301. In addition, when the third settlement is performed on the airflow, the arrangement of the whirl chamber 1501 allows a third dust collection chamber 302 to have enough height and space, so that the airflow for the third settlement is provided with a sufficient settlement height and can therefore be fully settled, and then enters into the filter 2 through the whirl chamber 1501, thereby further reducing the dust and debris entering the filter 2.

The dust removal structure 1 utilizing airflow whirls in the above embodiment includes the outer barrel 11, the first internal barrel 12, the second internal barrel 13, the whirl barrel 15, and the third internal barrel 14. When the motor is working, the first airflow whirl chamber 101 is formed between the outer barrel 11 and the first internal barrel 12, the second airflow whirl chamber 201 is formed between the first internal barrel 12 and the second internal barrel 13, and the third airflow whirl chamber 301 is formed inside the second internal barrel 13 and the third internal barrel 14, so that part of the dust and debris settles at a bottom of the first airflow whirl chamber 101, the air after the first settlement passes through the first internal barrel 12 and then enters into the second airflow whirl chamber 201 such that part of the dust and debris settles at the bottom of the second airflow whirl chamber 201, and the air after the second settlement passes through the second air outlet 203 and then enters into the whirl chamber 1501 such that the air, after guided by the whirl chamber 1501, enters into the third airflow whirl chamber 301 of the third internal barrel 14 for the third settlement. This dust removal structure 1 utilizing airflow whirls can be used to settle the dust and debris three times, which greatly reduces the amount of dust and debris entering the filter 2. Moreover, the filter 2 is arranged at the whirl barrel 15 which is far away from the third dust collection chamber 302, so that the dust and debris are not easily subjected to the airflow and thus will not enter into the filter 2, thereby the service life of the filter 2 can be prolonged.

In one of the embodiments of the present application, please refer to FIGS. 1 to 3, the outer barrel 11 includes an outer cylinder portion 111 and a base portion 112. The outer cylinder portion 111 is cylindrical, and the base portion 112 is connected to a bottom of the outer cylinder portion 111. A periphery of the third internal barrel 14 is sleeved with a dust collection barrel 16, one end of the dust collection barrel 16 away from the second internal barrel 13 is connected to the base portion 112, and the dust collection barrel 16 divides the space between the outer cylinder portion 111 and the third internal barrel 14 into two areas. Specifically, the dust collection barrel 16, the base portion 112, and the outer cylinder portion 111 are enclosed to form a first dust collection chamber 102 which is located at the bottom of the first airflow whirl chamber 101, and the first dust collection chamber 102 communicates with the first airflow whirl chamber 101; the dust collection barrel 16, the third internal barrel 14, and the base portion 112 form the third dust collection chamber 302 which communicates with the third airflow whirl chamber 301 through a dust outlet 304, and the third dust collection chamber 302 and the third airflow whirl chamber 301 are arranged as relatively separated, so that the dust and debris in the third dust collection chamber 302 is not easy to flow backward into the filter 2.

Optionally, one side of the outer cylinder portion 111 is rotatably connected to the base portion 112, and another side of the outer cylinder portion 111 is attached to the base portion 112 with a snap-fit, so that the base portion 112 may be opened through rotation relative to the outer cylinder portion 111, thereby facilitating cleaning the dust inside the first dust collection chamber 102 and the third dust collection chamber 302. When it is necessary to clean the dust and debris inside the first dust collection chamber 102 and the third dust collection chamber 302, the snap-fit connecting the outer cylinder portion 111 and the base portion 112 is released, and then the base portion 112 is rotated relative to the outer cylinder portion 111, in this way the dust and debris can be poured out.

Optionally, a sealing ring is provided on a joint surface between the outer cylinder portion 111 and the base portion 112 to prevent the dust and debris from leaking from the base portion 112.

Optionally, referring to FIGS. 3 and 10, one end of the third internal barrel 14 away from the second internal barrel 13 is provided with a dust baffle plate 141, and the dust outlet 304 is provided at the third internal barrel 14 near the dust baffle plate 141, so that the dust and debris in the third airflow whirl chamber 301 enter into the third dust collection chamber 302 through the dust outlet 304. That is to say, the bottom of the third internal barrel 14 is provided with dust baffle plate 141, and a side wall of the third internal barrel 14 near its bottom is provided with the dust outlet 304, so that the dust and debris in the third airflow whirl chamber 301 enter into the third dust collection chamber 302 through the dust outlet 304. The number of dust outlet 304 is not limited herein. When there are a plurality of dust outlets 304, the plurality of dust outlets 304 are evenly arranged circumferentially, so that the dust and debris can enter into the third dust collection chamber 302 from various directions. Correspondingly, a connecting rib 143 connecting the third internal barrel 14 and the dust baffle plate 141 is formed between adjacent two dust outlets 304.

In one of the embodiments of the present application, please refer to FIG. 2, the first internal barrel 12 includes a plurality of grilles 121 arranged in an annular array, and an air inlet gap is formed between adjacent two grilles 121, and the plurality of the air inlet gaps constitute the second air inlet 202 described above. It should be noted that the second air inlet 202 and the first air outlet are the same opening. Optionally, the grille 121 is elongated, and a longitudinal direction of the grilles 121 is parallel to an axial direction of the first internal barrel 12. Optionally, an air inlet direction of the air inlet gap is arranged at an included angle with a radial direction of the air inlet gap, so that the annular arrangement of the plurality of grilles 121 is similar to the arrangement of a shutter.

Optionally, referring to FIGS. 9 and 10, the second internal barrel 13 and the third internal barrel 14 are integrally formed, so that the connection between the second internal barrel 13 and the third internal barrel 14 is smoothly arranged, and a wall of the third airflow whirl chamber 301 is smooth, and there will be no mounting slit. When the airflow flows in the third airflow whirl chamber 301, there will be no dust and debris trapping in the mounting slit.

Optionally, referring to FIGS. 9 and 10, the second internal barrel 13 and the third internal barrel 14 jointly form a conical barrel, and the interior of the conical barrel is the third airflow whirl chamber 301. The inner walls of the second internal barrel 13 and the third internal barrel 14 are smoothly connected, and the bottom end of the conical barrel is arranged near the whirl chamber 1501. The structure of the conical barrel makes the flow velocity of the airflow gradually slow from the bottom to the top and hence prevents turbulence at the top of the conical barrel (the top of the second internal barrel 13), so that most of the dust and debris can be stably settled to the third dust collection chamber 302.

Optionally, referring to FIGS. 9 and 10, an annular protruded portion 131 is formed through radially outward extending the connection between the second internal barrel 13 and the third internal barrel 14, and the first internal barrel 12 may be fixed on the annular protruded portion 131. More specifically, in conjunction with FIGS. 4 to 6, the spiral lines in FIGS. 4 and 6 both represent the airflow. The annular protruded portion 131 is provided with a positioning hole 1311, and the first internal barrel 12 is provided with a positioning column 1211 configured to insert into the positioning hole 1311, so that the first internal barrel 12 is positioned and fixed on the annular protruded portion 131. When the first internal barrel 12 includes the plurality of grilles 121 arranged as the annular array, one end of each of the grilles 121 extends to form the positioning columns 1211, and the positioning columns 1211 of the grilles 121 may be inserted into the positioning holes 1311 of the annular protruded portion, so that the grilles 121 are inserted on the annular protruded portion 131 respectively. In this way, not only it is convenient for mounting the first internal barrel 12, but also the first internal barrel 12 and the whirl barrel 15 can be directly removed together from the annular protruded portion 131 and the dust and debris can be poured out when the dust and debris deposited in the second dust collection chamber need to be cleaned.

In one of the embodiments of the present application, please refer to FIGS. 3 to 5, the second internal barrel 13 is provided inside the first internal barrel 12, the annular protruded portion 131 is connected to the bottoms of the first internal barrel 12 and the second internal barrel 13, and the bottom of the whirl barrel 15 is connected to the tops of the first internal barrel 12 and the second internal barrel 13, in this way the first internal barrel 12, the second internal barrel 13, the annular protruded portion 131 and the bottom of the whirl barrel 15 (i.e., a whirl bottom portion 152 described below) are enclosed to form the second airflow whirl chamber 201. The second air inlet 202 is provided in the first internal barrel 12, and the second air outlet 203 is provided at the bottom of the whirl barrel 15. When the airflow whirls in the second airflow whirl chamber 201, part of the dust and debris settles on the bottom of the second airflow whirl chamber 201 (on the annular protruded portion 131), and the bottom of the second airflow whirl chamber 201 is the second dust collection chamber. The airflow after the second settlement enters into the whirl barrel 15 through the second air outlet 203.

In one of the embodiments of the present application, please refer to FIGS. 5 to 7, the spiral lines in FIG. 7 represent the airflow. The whirl barrel 15 includes a whirl cylinder portion 151, an air guiding portion 153, and a whirl bottom 152. The air guiding portion 153 is arranged inside the whirl cylinder portion 151 and is configured to guide the airflow so that the airflow after guided by the whirl barrel 15 enters into the interior of the second internal barrel 13 and the third internal barrel 14 (the third airflow whirl chamber 301). The whirl bottom 152 is connected to one end of the whirl cylinder portion 151 near the first internal barrel 12, and is configured to separate the second airflow whirl chamber 201 and the whirl chamber 1501 and prevent the airflow in the second airflow whirl chamber 201 from directly entering into the whirl chamber 1501 without the second settlement, so that the dust removal performance can be enhanced. The whirl bottom 152 is provided with the above-mentioned second air outlet 203, so that the airflow can enter into the whirl chamber 1501 through the second air outlet 203 only.

In one of the embodiments of the present application, please refer to FIG. 6, the air guiding portion 153 includes a plurality of diverging blades 1531 circumferentially arranged and arranged in a radiated distribution, the function of the diverging blades 1531 is to make the airflow flow from the edge of the whirl cylinder portion 151 toward the center of the whirl cylinder portion 151, and then make the airflow enter into the third airflow whirl chamber 301. Correspondingly, the diverging blades 1531 are gradually divergent from the center of the whirl cylinder portion 151 to the edge of the whirl cylinder portion 151, so that the airflow gradually converges from the edge of the whirl cylinder portion 151 to the center of the whirl cylinder portion 151 and then enters into the third airflow whirl chamber 301.

In one of the embodiments of the present application, please refer to FIG. 8, the whirl barrel 15 includes the whirl cylinder portion 151, the air guiding portion 153, and the whirl bottom portion 152, and further includes a central support portion 154 configured to connect the diverging blades 1531 and the whirl cylinder portion 151, so that the overall strength of the whirl barrel 15 can be strengthened. The central support portion 154 may also serve to block the airflow after the second settlement from entering into the filter 2 without the third settlement.

Optionally, the central support portion 154 includes an annular portion 1541 and an internal guiding cylinder 1542. The internal guiding cylinder 1542 is formed by extending an inner ring of the annular portion 1541 toward an axial direction of the third airflow whirl chamber 301, and the annular portion 1541 can partially shield the top of the third airflow whirl chamber 301, so that the airflow after the second settlement is prevented from entering into the filter 2 without the third settlement. The arrangement of the internal guiding cylinder 1542 has a blocking effect on the airflow guided by the diverging blades 1531, and thus prevents the airflow guided by the diverging blades 1531 from directly spraying to the center of the third airflow whirl chamber 301, so that the airflow at the center of the third airflow whirl chamber 301 is relatively stable, thereby maintaining a stable state of continuous airflow input to the filter 2.

Optionally, a reinforcing rib 1543 is provided at one end of the internal guiding cylinder 1542 away from the annular portion 1541. The reinforcing rib 1543 is connected to an inner wall of the internal guiding cylinder 1542, and plays a role of supporting and strengthening the internal guiding cylinder 1542 to prevent the internal guiding cylinder 1542 from being deformed.

The specific structure of the reinforcing rib 1543 is not limited here, and may be a structure such as a cross rib and the like.

In one of the embodiments of the present application, please refer to FIG. 8, the whirl barrel 15 and the first internal barrel 12 are integrally formed. Optionally, the whirl cylinder portion 151 of the whirl barrel 15 is axially connected with the first internal barrel 12, and the first internal barrel 12 may be formed by axially extending the whirl cylinder portion 151. The integral formation of the whirl barrel 15 and the first internal barrel 12 eliminates the need to mount the whirl barrel 15 and the first internal barrel 12, which can save the assembly cost.

In one of the embodiments of the present application, please refer to FIG. 11, a dust collector is also provided. The dust collector includes the dust removal structure 1 utilizing airflow whirls in any of the above embodiments. The dust collector may be of various types such as a hand-held type or a seat type. The dust collector further includes a motor, a filter 2 and a suction head assembly 3. The motor is configured to generate negative pressure in the dust collector, so that the suction head assembly 3 can suck the dust the debris on the ground into the dust collector, and the whirling airflow is formed in the dust collector includes the dust removal structure 1 utilizing airflow whirls, in this way the inhaled airflow is dedusted and then discharged through the filter 2. The filter 2 is connected to one end of the whirl barrel 15 away from the third internal barrel 14, that is, the filter 2 is arranged at the third air outlet of the third airflow whirl chamber 301.

The dust collector in the above embodiment adopts the dust removal structure 1 utilizing airflow whirls in any of the above embodiments. The dust removal structure 1 utilizing airflow whirls is provided with the first airflow whirl chamber 101, the second airflow whirl chamber 201 and the third airflow whirl chamber 301, which can perform three times of settlements for the inhaled dirty air, thereby greatly reducing the amount of the dust and debris entering into the filter 2. Moreover, the filter 2 is arranged at the whirl barrel 15, which is far from the third dust collection chamber 302, and hence the dust and debris are not easy to enter into the filter 2 under the effect of the airflow, thereby the service life of the filter 2 can be prolonged and the replacement frequency of the filter 2 in the dust collector can be reduced.

Optionally, referring to FIG. 12, the suction head assembly 3 includes a suction head casing 31 and a side brush 32 rotatably connected to the suction head casing 31. The side brush 32 is arranged at an edge of the suction head casing 31 and configured to clean sanitary dead corners. The number of the side brush 32 is not limited herein, and each corner of the suction head casing 31 may be provided with the side brush 32. The side brush 32 includes a hub 321 and a plurality of bristles 322 circumferentially arranged on an outer periphery of the hub 321. When the dust collector is working, the hub 321 of the side brush 32 rotates to make the bristles 322 rotate to clean the sanitary dead corners, thereby improving the cleaning power of the dust collector.

Optionally, the filter 2 is connected to the dust removal structure 1 utilizing airflow whirls in a rotary snap connection, so that the dust removal structure 1 utilizing airflow whirls is convenient to be removed for dust cleaning. A housing of the filter 2 is provided with a first buckle portion, and the outer barrel 11 of the dust removal structure 1 utilizing airflow whirls is provided with a second buckle portion, and the first buckle portion and the second buckle portion are rotationally clamped.

The above has only described optional embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application. 

What is claimed is:
 1. A dust removal structure utilizing airflow whirls, comprising an outer barrel, a first internal barrel arranged inside the outer barrel, a second internal barrel arranged inside the first internal barrel, a third internal barrel arranged at one end of the second internal barrel, and a whirl barrel arranged at another end of the second internal barrel, wherein the whirl barrel is configured to communicate with a filter, a first airflow whirl chamber is formed between the outer barrel and the first internal barrel, a second airflow whirl chamber is formed between the first internal barrel and the second internal barrel, an interior of the whirl barrel is provided with a whirl chamber, and an interior of the second internal barrel and an interior of the third internal barrel together form a third airflow whirl chamber, wherein the outer barrel is provided with a first air inlet communicating with the first airflow whirl chamber, the first internal barrel is provided with a second air inlet communicating with the first airflow whirl chamber and the second airflow whirl chamber, the whirl chamber and the second airflow whirl chamber communicate with each other through a second air outlet, and the whirl chamber and the third airflow whirl chamber communicate with each other through a third air inlet.
 2. The dust removal structure utilizing airflow whirls according to claim 1, wherein, the outer barrel comprises an outer cylinder portion and a base portion connected to one end of the outer cylinder portion, a periphery of the third internal barrel is sleeved with a dust collection barrel, and one end of the dust collection barrel away from the second internal barrel is connected to the base portion, wherein the dust collection barrel, the base portion, and the outer cylinder portion are enclosed to form a first dust collection chamber, and the dust collection barrel, the third internal barrel and the base portion form a third dust collection chamber.
 3. The dust removal structure utilizing airflow whirls according to claim 2, wherein, one end of the third internal barrel away from the second internal barrel is provided with a dust baffle plate, and a dust outlet communicating with the third dust collection chamber is provided at the third internal barrel near the dust baffle plate.
 4. The dust removal structure utilizing airflow whirls according to claim 1, wherein, the first internal barrel comprises a plurality of grilles arranged in an annular array, and an air inlet gap is provided between adjacent two of the grilles, and a plurality of the air inlet gaps constitutes the second air inlet.
 5. The dust removal structure utilizing airflow whirls according to claim 1, wherein, the whirl barrel comprises a whirl cylinder portion, an air guiding portion arranged at the whirl cylinder portion, and a whirl bottom, the whirl bottom is connected to one end of the whirl cylinder portion near the first internal barrel, and the second air outlet is provided on the whirl bottom.
 6. The dust removal structure utilizing airflow whirls according to claim 5, wherein, one end of the second internal barrel near the third internal barrel is radially extended to form an annular protruded portion, and the first internal barrel, the second internal barrel, the annular protruded portion and the whirl bottom are enclosed to form the second airflow whirl chamber.
 7. The dust removal structure utilizing airflow whirls according to claim 6, wherein, the annular protruded portion is provided with a positioning hole, and the first internal barrel is provided with a positioning column configured to insert into the positioning hole.
 8. The dust removal structure utilizing airflow whirls according to claim 5, wherein, the air guiding portion comprises a plurality of diverging blades circumferentially arranged and configured to make airflow flow from an edge of the whirl cylinder portion toward a center of the whirl cylinder portion.
 9. The dust removal structure utilizing airflow whirls according to claim 8, wherein, the whirl barrel further comprises a central support portion, and both ends of the diverging blades are connected to an inner wall of the whirl cylinder portion and the central support portion respectively.
 10. The dust removal structure utilizing airflow whirls according to claim 9, wherein, the central support portion comprises an annular portion and an internal guiding cylinder formed by extending an inner ring of the annular portion toward an axial direction of the third airflow whirl chamber, and the diverging blades are connected to the annular portion and arranged at a periphery of the internal guiding cylinder.
 11. The dust removal structure utilizing airflow whirls according to claim 1, wherein, the first internal barrel and the whirl barrel are integrally formed.
 12. The dust removal structure utilizing airflow whirls according to claim 1, wherein, the second internal barrel and the third internal barrel are integrally formed.
 13. The dust removal structure utilizing airflow whirls according to claim 12, wherein, the second internal barrel and the third internal barrel jointly form a conical barrel, and a bottom end of the conical barrel is arranged near the whirl chamber.
 14. A dust collector, comprising the dust removal structure utilizing airflow whirls according to claim 1, and further comprising a motor configured to generate airflow, the filter provided at one end of the whirl barrel away from the third internal barrel, and a suction head assembly configured to clean ground.
 15. The dust collector according to claim 14, wherein, the suction head assembly is provided with a side brush configured to clean dead corners. 